Drill steel guide



Dec. 26, 1944. Q F OSGOQD 2,365,685

DRILL STEEL GUIDE Filed Feb. 1'7, 1942 3 Sheets-Sheet l Dec. 26, 1944. QF, OSGQQ@ 2,365,685

DRILL STEEL GUIDE vFiled Feb. 17. 1942 5 Sheets-Sheet 2 Dec. 26, 1944.

Filed Feb. 17. 1942 c.- F. osGooD l2,365,685 DRILL STEEL GUID-E 5sheets-sheet s' Patented Dec. 26, 1944 DRILL STEEL GUIDE Charles F.Osgood, Claremont, N. H., assignor to Sullivan Machinery Company, acorporation of Massachusetts Application February 17, 1942, SerialNo.431,250

13 Claims.

This invention relates torock drills, and more particularly toimprovements in a drill steel guide especially designed for use With amounted rock drill of the drifter type.

In mounted rockV drills of the drifterA type, the drill hammer motor isslidably guide-d in the guideways of a guide shell, and there is usuallyprovided some sort of drill steel guide or cen-v tralizer at the forwardend of the guide shell for centering the drill steel actuated by thehammer motor during starting or "spottin-g of a drill hole. In-suchdrill steel guides or centralizers, the guide is ofttimes automaticallyreleased from guiding relation with the drill steel as the drill hammermotor is fed forwardly along the shell guideways, and various deviceshave been devised to eilect such automatic release. Also in such guidesor centralizers a pair of pivoted guide arms are frequently employedtoembrace the body of the drill steel; and'these guide arms, when they areautomatically swung outwardly into non-guiding position as the hammermotor approaches the guide, project laterally a substantial distancebeyond the sides of the guide shell in order to clear the hammer motorto enable the latter to move forwardly beyond the guide. Suchlateral.projection of the guide 4arms beyond the sides of the guide shell isfoundto be undesirable, particularly in the restricted quarters in anunderground mine. In other types of guiding orcentralizing devices Whichdid not employ pivoted guide arms, While lateral compactness wasobtained the desired -guiding of the drill steel was lacking.

An object of the present invention is to provide an improved drill steelguide or centralizer which, to a large extent, overcomes thedisadvantages of certain previous devices. provide an improved drillsteel guide having novel mounting means for the guiding elements thereofwhereby the latter when released from guiding relation with the drillsteel, are maintained Within the lateral limits of the guide shell.Still another object is to provide an improved drill steel guideembodying a pair of cooperatingguide -arms which are pivotally mountedto swing about as the latter is fed forwardly along the shellguidevvays. Yet another object ,is to provide a Another object is tonovel drill steel guide having improved locking means for holding theguide in'guiding relation with the drill steel, and which isautomatically released upon engagement lthereof by the ldrill hammermotor as the latter is fed forwardly along the shell guidevvays. Yet`another object is to provide a novel drill steel guide having improvedlocking means for holding the guide in guidingr relation with the drillsteel and novel means for automatically moving the guide intonon-guiding positioniwhen the locking means is released. A still furtherobject is to provide an improved drill steel guide embodying a novelspring arrangement for automatically moving rthe lguide arms into vtheirnoneguiding position when released from their guiding relation with thedrill steel. Yet another object is to provide an improved drill lsteelguide having a novel arrangement and combination of parts. Other andfurther objects and their resultant advantages will be apparent afterthe invention becomes better understood from an examination of thespecirock drill and steel guide shown in Figs. 1 and 2,

showing the guide arms in their later-ally released position.

Fig. 4 is a view similar to Fig. l, with parts shown invertical section,with the `guide in its non-guiding position.

Fig. 5 is a cross sectional View taken substantially on lirici-5 of Fig.1.

Fig. 6 is a horizontal sectional view taken substantially on line 6-6 ofFig. 1. i l, I

Fig. 7 is a View in longitudinal vertical section taken substantially online l-'l of Fig. 2. l

Fig. Sis a detail horizontal sectional view taken substantially on line8-8 of Fig. 1.

Fig.` 9 is a fragmentary side elevational view, similar to Fig. 1,illustrating another embodiment of the invention.

Fig. 10 is a front end elevational view of the rock drill and steelguide shown in Fig. 9.

Fig. 11 is a View similar to Fig. 10,y showing the guide arms in theirlaterally released position.

Fig. 12 is a view similar to Fig. 9, with .parts shown in longitudinalvertical section, illustrating the guide in its non-guiding position.

Fig. 13 is a cross sectional view taken substantially on line I3--I 3 ofFig. 9.

Fig. 14 is a horizontal sectional View taken substantially on lineI4--I4 of Fig. 9.

Fig. 15 is a detail view'in longitudinal vertical section takensubstantially on line I -I5 of Fig. 10.

Fig. 16 is a fragmentary side e1evationa1 view ofr:

a rock drill with which still another illustrative embodiment of theinvention is associated.

Fig. 17 is a front end elevationalview, with:

parts in vertical section, of'--'the-f-rock drilland steel guide shownin Fig. 16.

Fig. 18 is a front end elevational .view'otheY rock drill and steelguide shown in Fig. 16 with the guide arms in their laterally releasedv'posi` tion.

guide in itsl non-guiding position... Y

Fig. 20 is7 a crosssectional, View. takensubsta'n. tially. on line20`2Il-o Fig` .16;

Fig.` 21 is a .horizontal.sectionalviewtalmn,subel stantially on.line 2Ir-Zll of.Fig.;16.`

Innthe severalembodiments of the. invention. the improved. drill steel;guide is shown associated with f atconventional. hammer.. rock .drill lof. .the

the improveddrill; steel guide may..be .associated .1

The. .hammer rock ydrill disclosed hereinin the.. several. embodimentsVof; the. inventioncomp'rises a .conventional drill. hammer.. motor. I.islidalblyn guided 0n.. a conventional.. guidesheII.. 2,` thelatter..

adapted to f bemounted .on a .conventional dr'll` support. Thefdrill-.hammer motor .comprises a.. motor cylinder V3 Acontaining areciprocatory ham.

mer piston (not shown). .-for. .percussiyely'I actuat. ing -.a drill.steel .4, the,` latter being,.,supported in a usualf chuck Vwithin1airont. .chuck Vhousing .5 l".

suitablyattached .toxthe frontendof .the motor cylinder. Thehamme-rmotor cylinder. hasusual lateral guides 6, 6 slidinglyreceivedwithin-.longitudinal guideways .1, 'IV of.K the yguide .shelllThe hammer motor. .may be -fed alongthev shell. guideways in any,conventiona1...manner. rock drill disclosed is of a conventionaldesignand is well knownto thoseskilledin the art; further description and.illustration thereof. are here.-

in unnecessary. f

In theembodiment ofthe invention shown-in Figs. 1 to 8, inclusive.`theimproveddrillifsteel.

guide or centralizer, 1 generally Vdesignated \.8.,`.com.. prises abracket 9 attached by bolts I0, ,whichherein may be the-usual shellsidebolts, tothe Fig..l9 is a:view similar .to Fig..1.6.3'sh/owing..thev

Since .the

` motor, so that the latter ,maybe fed forwardly front end. of theguide-shell.. This. bracket. has. a

forwardly located lug Il provided vwith..a..tra ns., verse bore I2through-whicha.pivnt.bolt' I3 passes.

Pivotally mounted on the projectingfends .of .'the.v

pivot bolt-I3 are arm:sinriports..I4,l AL4 fon .which are pivotallymounted fon..v parallel pivot bo1t`s|5 a pairof guide arms |6,`;I6....The axesof the vpivot bolts I5',.- I5`are arrangedrat. right angles. to.the axis ofy the pivot. bolt I3,.'s'oI thattheguidearms may swing intoand. outof their. guidingrelatio'n.. with the. drill steel. aboutrectangularly` related pivotal axes.. These guidearms. haveguidingportions I'I appropriately shaped to^engage...the body of thedrill steel to hold thelaltt'erl centered' dur.- ingstarting,or-.Spottirigf.'of 'a holelinthelmanner Awellkr'iowr'i. to.those..ski1led jin'. the art. The

guide arms have projectinglugsl'f.' lnear their. pivots, and these lugs`are engageable at vI9 with" the outer sides of the arm supports I4 forlmiting lateral swinging movement of thel guide arms about the pivotbolts I5. The arm supports I4 have depending lugs 2U engageable at 2|with the bottom of the bracket 9 for limiting downward swinging of thearm supports and guide arms' l'tion." Tlleitorsionl springs 23 serve toswing the guide arms 'a slighty distance apart sufcient to cleary thesides of-thedrill steel body while the torsion springs 22 act to swingthe arm supports I41to move-the guide arms forwardly and downwardly outof the path of Amovementof the drill hammer motor.4 Pivotallymounted onatransverse pivot pin 24 onthe upper side of the bracket 9 is aspring-pressed latch 25 havinganappropriately. shaped locking'portion 26engageable with -25' lugsA 211integral Vwiththe guide. .arms I6, I6 forlocking the guide arms. in, guiding relation with the drill steel. Thislatchih'as an upper cam .suiv face 28 adapted. to be .engaged by theforward endof. the chuck housing. 5'oi the drill Lhammer. motor as the.latter isA .fedforwardly `along `the shellguideways. so that .the .latchis depressed to eifectreleaserof.theguide prior vto engagement of thehammer motor witlithe guide, arms. When thislatch released vfrom .thearm4 lugs. 21," the torsion springs 23 automatically swingthe guide armsAaboutitheir.parallel pivots into their laterally released. positionasshown inv Fig. 3,' and thereafter the torsion. springs 22automatically.`v

swingtheguide arms forwardly. and. downwardly about the transversepivotinto. their. non-guiding positionshownin. Fig. 4.' When the guidearms are in the position. shown. in Fig.; 4,. they are disposed out ofthe pathof movement of the hammer along the shellguideways .past the.guide.

In the. operation of this embodiment of the irnproved drill steelguide', whensit is desired to. start or. spot a drill hole. the. guidearms I6,` I6 mayl be swung upwardly` about the transverse pivot" bolt.I3-into the position shown inFig,v 1, and thereafter'. swung inwardlyabout the pivot bolts I5 into guiding relation with, the drill steel asshown in Fig. 2. As the. guidear-ms are swung,v

into guiding relation .with the drill steel,` the latch, 25 snaps overthev lockinglugs 21 on the guide arms to lock the latter in position.,As the drill hammer motor is ,fed forwardlyalong the shell guideways,the .guide arms serve to center the drillste'el.. and whenthe frontchuck" housing 5 engages the cam surface28 'on the latch the latter. isdepressedfto effect .release of' the locking lug 26 from the lugsl21 onthe guide arms. When the latch'is in. its, released position. and the.guide. arms are unlocked, the torsionsprings,A 23 act automatically tovswingtl'ie guide. arms apart into their laterally .released positionshown in Fig. 3, sufciently to clearthe. sidesof the steel body, andthereafter the torsion springs 22 actvto swing the arm supports I4 aboutthe transverse pivot to move the 'guide' arms into the:

non-guiding positionshownj invFig. 4out of the. path of movement, of thedrill hammer motor.'

As the guide arms swing 'apart laterally;v the lugs" I8 thereon moveinto; engagement with the outer surfaces lof the arm'r supports;therebyto4 limit" outward swinging movement ofthe arms; and as` the armsupports swing downwardly, downward movement of the guide arms islimited by engagement of the support lugs 20 with the bottom ofthebracket 9. By the provision of separate and `distinct pivotalmountings for the guide anrns, the latter may be individually placed in'guiding relation withthe drill steel, for instance, during spotting of adrill hole on an inclined face when but a single arm suices to preventlateral deflection ofthe drill steel." y l lIn the embodiment of theinvention shown `in Figs. 9 to 15, inclusive, a bracket 30, attached tothe front end of the guide shell 2, hasforwardly projecting,`laterallyspaced lugs 3l, 3l'

provided with alined openings through which a. transverse pivot bolt 32passes A pair of guide arms 33, 33 have their hubs 34 arranged betweenthe bracket lugs in the manner shown in Fig. 13,

and, are pivotally mounted on the pivot bolt l32` the bracket lugs arecoiled torsion springs' 39A which constantly urge the guide armsforwardly and downwardly about thepivot bolt axis. The arm hubs havedepending boss-es 40 formed with bores 4I in which spring-pressed`plungers 42 are arranged. These plungers engage the. surfaces ofarcuate bearing portions 43 integral with the bracket lugs, as shown inFig. 15; These plungers constantly tend to rock the guide arms towardtheir laterally released position shown in Fig. 11, and cooperate withthe bracket lugs in limiting downward swinging movement of the arms.Pivoted on a transverse pivot pin`44 on the upper part of the bracket isa spring-pressed latch 45 having an appropriately shaped locking lug 46engageable with lugs 41, 41 integral with the guide arms. This latchholds the guide arms 1 in their guiding positionishown in Fig. 10, and

is formed with a cam surface 48 adapted to be engaged by the forward endof the chuck housing as the hammer motor is fed forwardly along theshell guideways. When the latch is released from the arm lugs 41, thespring-pressedv plungers 42 automatically vswing the guide arms apartinto their laterally released position, 'and thereafter the torsionsprings 39 act automatically to swing the guide arms forwardly anddownwardly about the pivot bolt 32 into their nonguiding position shownin Fig. l2, out ofthe path of movement of the hammer motor.

The mode of operation of this embodiment of the invention is similar tothat above described. When the hammer motor is fed forwardly along theshell guideways, the front chuck housing 5 engages the cam surface 48 onthe latch depressing the latter and releasing the locking lug 46 fromthe locking lugs 41 on the rguide arms. When the latch is in releasedposition, the springpressed plungers 42 throw the guide arms apart intotheir laterally released position shown in Fig. 11, so that guidingportions thereof just l clear the sides of the body of the drill steel.The torsion springs 39 then act automatically to swing the guide armsforwardly and downwardly about the pivot bolt 32 into their non-guidingpivoty bolt 52 passes.

position shown in Fig. 12, out of the path of movement of the hammermotor. Likewise, as in the other form of the invention above described,by the provision of they separate arm mountings, theguide arms may beplaced either separately or simultaneously in guiding relation with thedrill steel.

In the embodiment of the invention shown in Figs. 16 to 2l, inclusive, abracket 5B, attached to the front end of the guide shell 2, haslaterally spaced, forwardly located lugs 5I, 5I provided with alinedopenings through which a transverse Pivotally mounted on this pivot boltbetween the bracket lugs is an arm support 53 which carries parallelpivot bolts 54,

54 on which a pair of cooperating guide arms 55,`

55 are pivotally mounted. The axes of the pivot bolts 54 are arranged atright angles to the axis of the transverse pivot bolt 52, so that theguide arms swing into and out of guiding relation with the drill steelabout rectangularly related pivotal axes. Arranged within suitablerecesses 56 in the opposite sides of the arm support 53 and surroundingthe pivot bolt 52 are coiled torsion springs 51, 51 which constantlyurge the arm support, together with the guide arms, forwardly anddownwardly about the axis of the pivot bolt 52. Suitable means isprovided for urging the guide arms constantly apart, i. e. towards theirlaterally released position, and for normally maintaining them withtheir guiding portions just clearing the sides of the drill steel body.For

` this lateral urging, I have shown a spring arrangement disclosed inacopending application of one J. C. Curtis, Serial No. 447,016, led June15 1942. said arrangementincluding a torsion spring 58 with coiledportions 59 surrounding the pivot bolts. The guide armshave lugs 6l]near their pivots, and these lugs are engageable with the outer sides ofthe arm support 53 for limiting lateral swinging movement of the guidearms, and the arm support 53 has a lug 6l engageable with the bottom ofthe bracket for limiting downward swinging movement of the guide arms.The guide arms have at their inner sides integral lugs 62 and G3, andthe former lug has a longitudinal bore 64 in which a locking bolt 65 isslidingly guided. This locking bolt has an appropriately shaped lockinglug 66 engageable with a projection 61 on the lug 63 for holding thearms together in guiding relation with the drill steel. A coil spring 68urges the locking bolt rearwardly into its lockingr position. Alsointegral with the rear sides ofthe guide arms are lugs 69 engageablewith projections 10 integral with the bracket for holding the guidearms, when the latter are in guiding relation with the drill steel, fromswinging forwardly and downwardly about the axis of the pivot bolt 52. t

As in the embodiments of the invention above y described, when the drillhammer motor is fed `automatically to swing the guide arms forwardlyvcir-:the path` ormovement; of the. drill-hammer motor.

torsion springs precludes this.

In the several embodiments of the invention above described, it is theintention` initially' to effect'swinging of the arms apart about-,thearm pivot axes into their.l laterally released position, so that theguiding portions. thereof just Aclear the sides of the body of the drillsteel, and thereafter to swing the. arms forwardly and downwardlyabout-theright angle axis' into their non-guiding position.A By thusVfirst swinging the arms a slight distance apartthe guiding portion ofthe arms will` clear the steel before the arms start to swingdownwardly. By moving theV arms apart only a distance suicient to clearthe sides ofthe 'drill steel body, undesirable lateral projection of theguide arms beyond the sides of the guide shell is eliminated. In theembodiment of the inventionlast. described, the guide arms arepositively locked against downward swinging movement by the arm lockinglugs engaging projections on the bracket,V andpin the rst and secondembodiments-.similar` positive locking means maybe employed?. Forinstance, inthe second embodiment, `above described, the arm hubs andbracket. lugsimay have: suitable interengaging locking portions Vwhichare released as the arms rockapart. Also; the torsion springs may besodesigned as to assure swinging of the arms apart prior-tothe: forwardand downward swinging movement of. .the arms.

As a result of .this invention it will. be noted that an improveddrillsteel guide or centralizer is. provided whichisextremely rugged andcompact in construction and simple in design. It willfurther be evidentthat by they provision of theA improved pivotal'. mountingr for theguide arms, enabling the: latter to swing' about rectangularly related`pivotal axes rin' the-manner disclosed, excessive lateral projectionofthe guide.

arms beyond the sides of the guide shell is elim; inated. Furthermore,by the provision of the particular arm locking arrangement and thespring means for automatically' moving the arms intoA theirnon-guidingposition; jamming of the parts by'inadvertentw engagement of;the drill hammer motorwith the-guide is prevented, and the lguide isquickly thrown into 'non-guiding position just as soonzas the lock isreleased irre- Inr this embodimentof: the invention, 1tisrnotpossible-to fplace :separately ithe. guide armsi iny guidingrelation: with;Y the drill steel, 'since the particular construction ofthe locking bolt and..

andvdownwardlyi,-iabout-zthe `pivot `bolt 52 into;` their noneguiding,position-shown.- in; Fig. 19 out,

parallel planes,^ extending .-iniparallelism .with` the --i drill.`steel.

2: Ina-drill steel guide, a pair of cooperating,l relatively; movableguide elements adaptedto en.-4V 1 gage a drill steel, and means forpivotally mount-- ing said guide elements both for swinging move-v mentabout-rectangularlyvj related axes, certain. ofsaidpivotal axes-.beingdisposed parallel tothe longitudinal-.axis ofthe drill `steelwhen saidguide--y elements are-in `steel guiding position whereby said guideelementsmay initially swing outwardly-v relative to each other awayfrom' the drill steel,

and: the remainder of f said rectangularly related axes'disposed `at;right angles to said parallel axes.- whereby said guideuelements may.swingdown-.- Wardly- -into an -.outof -the-way non-guidingv .po-

, sition..

3..In^a drillsteel: guide,

parallel axes, said-parallel axes, when the guide.

isin-guiding position, lying. in a plane extending-- in parallelism withthe drill steel, and a support.` swingable Aabout a transverse axis atrightang-les. to said armlpivot axes, said arms being pivotallymountedon said pivoted support and swingable with thelatter about saidtransverse axis.

4.- In a drill steel guide,.apairof cooperating,

relatively movable .guide elements ,movable into.- positions in and outl-of guiding relation witha.

drillA steel, and mountingmeans for said guide elements, saidmounting-'means-including,means for. supporting said guidetelements formovement` in aplurality of directions whereby said guide,- elements are.initially movable on said mounting meansra slight-distance apartout of.steel. guiding relation in` transverseplanes perpendicular to the,longitudinal axis of theY drill steelsuflicientlyto clear. the sidesvof the.. drill steel and.

thereafter movableonsaid mountingr means for-4 wardly. and .downwardlyin planes in parallelism with the :drill steel intotheirV non-guidingposition.`v

5. In a,drill steel guide, a pair of cooperating,

l-relativelymovable guide elements movable into spective of thesupported position of the drill.

Other uses and advantages of the invention will bey clearly apparent tothose skilled in the art. Whilev there are inthis applicationspecifically described several embodiments which the invention mayassume in practice, it will'be understood that these embodiments of thesame are shown for purposes of illustration and that the invention maybe further modified andv embodied in various other forms withoutdeparting from its spirit' or the scope offthe appended claims.

What I claim as new and desire to secure by Letters Patent is:

l. In a drill steel guide, a pair of cooperating, relatively movableguide elements adapted to engage a drill steel, and means for pivotallymounting said guide elements-bothfor-swinging movement aboutrectangularly related axes, said axes; when the-guide is` in guiding'position, lying in positions Yin and out of guiding relation with 'adrill steel, and pivotal mounting means for said axis of the drillsteel, and,f0r swinging move ment also about a right angle axis wherebysaid guide elements are initiallyswingable on said -mounting meansrelative to each other out of steel guiding relation about axes parallelto the longitudinal axis of the drill. steel. a slight distance apartsuicient to clearv the .sides of the drill steel and thereafterswingable on said mounting means about an axis disposed at rightangles-to said pivotal axes forwardly and downwardly into theirnon-guiding'position.v

6.A In a rockdrill,` 4a guide along which a drill,

- lsteel actuator isV guided for movement, a bracket `ontheforward endof said guide, a pair of4 cooperating guide arms movable relative toeach other into positions in and out of guiding` relatron with a `drillsteel, means vfor pivotally mount ing said guide' arms on said bracketto swing rel- !ative' thereto about rectangularly related axes,r andreleasable means on said bracket for locking said guide arms in ltheirsteel V,guiding position,

said locking-'means being releasable Ato free said arms ror'movementout' of' guiding relation withv the-drillsteel', saidrdrill steelactuator as it'moves` a pair. of cooperatingpivotedwguide .arms adaptedVto engage a drill` steel, ssaidarms.- being relatively swingableabout.

forwardly along said guide being engageable with an element of saidlocking means for eiecting release thereof, said guide arms being rstswingable about certain of said axes a slight distance apart suflicientto clear the drill steel and thereafter swingable about a right angleaxis in a for--` ward and downward direction into vtheir nonguidingposition out of the path of said drill steel actuator.

'7. In a drill steel guide, a pair of cooperating, relatively movableguide arms movable into positions in and out of guiding relation with adrill steel, and separate pivotal mountings for said guide arms eachproviding rectangularly related pivotal axes, said arms being swingab-leindependently about said rectangularly. related axes into and out ofguiding relation with the drill steel.

8. In a drillsteel guide, guiding means including a guide elementmovable into positions in and out of guiding relation with a drillsteel, and mounting means for said-guiding means including means forpivotally mounting said guide element to swing from its guiding positionin one direction about anaxis disposed parallel to the longitudinal axisof the drill steel and in a different direction about a right angleaxis.

9. In a drill steel guide, a pair of4 guiding elements movable relativeto each other into positions in and out of guiding relation with a drillsteel, andmeans for mounting said guiding .elements eachfor swingingmovement in diierent directions at right'angles relative to each otherone of which is in transverse planes perpendicular to the longitudinalaxis of the drill steel, said guiding elements being movable rst in onedirection and thereafter in a right angle direction.

10. In a drill steel guide, a guiding element movable into positions inand out of guiding relation with a drill steel, and means for mountingsaid guiding element for swinging movement into aforesaid positions,said mounting means including means for supporting said guiding elementfor swinging in one direction from its guiding position .in transverseplanes perpendicular to the longitudinal axis ofthe steel and means forsupporting said guiding element for swing- 'ing in another direction inlongitudinal planes lparallel to the longitudinal axis of the steel.

11. In a drill steel guide, a support, a pair of guide arms adapted toengage a drill steel and mounted on said support for independentswinging movement toward and from the drill steel about parallel axesarranged at the opposite sides of said support, and a lock on saidsupport and movable into and out of locking relation with said arms -forholding said arms in guiding relation with the steel, said lock beingengageable with said arms independently whereby said arms may beindividually or simultaneously locked in guiding position.

12. In a drill steel guide, a support, a pair of guide arms adapted toengage a drill steel and l mounted on said support for independentswinging movement toward and from the drill steel about parallel axesarranged at the opposite sides of said support, a lock on said supportand movable into and out of locking relationwith said arms for holdingsaid arms in guiding relation with the steel, said lock being engageablewith said arms independently whereby said arms may Abe individually orsimultaneously locked in guiding position, and means for automaticallythrowing said guide arms apart into their laterally released positionwhen said lock is in released posispect to said parallel axes and makesa right

